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+--- Thread: problem using exec to save local variables (/thread-22879.html)
problem using exec to save local variables - dkarl - Dec-01-2019
Hi everyone.
i'm trying to use the exec() function to be able to save variables defined between two editor lines in such a way:
### exec(string_to_get_local_variables_into_a_dictionary) a=1 b=2 ... exec(string_to_get_local_variables_again_and_get_the_difference_between_this_current_dictionary_and_previous_one) ###in order to get the above strings i've created two functions: save_tic(), save_toc().
however something weird happens -
1. when i simply execute - exec(save_toc()) doesn't work and it says i haven't defined variables which i did
2. when i debug to that point, manually return the string from save_toc() and execute it then it DOES work.
does anybody know what's going on?
###################################################
### Functions: ####
def save_tic(baseline_name_finale):
get_baseline_variables_str = '_baseline_variables = locals().copy()\n' \
'_baseline_variables_keys = list(_baseline_variables.keys())\n' \
'_baseline_variables_values = list(_baseline_variables.values())\n' \
'_baseline_variables_keys_set' + str(baseline_name_finale) + ' = set(_baseline_variables_keys)\n'
return get_baseline_variables_str;
def save_toc(base_finale, post_finale, prefix_to_delete=None):
saved_dictionary_name = 'saved_dictionary' + str(post_finale)
execution_string = '_final_variables = locals().copy();\n' \
'_final_variables_keys = list(_final_variables.keys());\n' \
'_final_variables_values = list(_final_variables.values());\n' \
'_final_variables_keys_set = set(_final_variables_keys);\n' \
'final_variables_dictionary = dict();\n' \
'for k,v in zip(_final_variables_keys,_final_variables_values):\n' \
' final_variables_dictionary[k] = v;\n' \
'relevant_keys_set = _final_variables_keys_set ^ _baseline_variables_keys_set' + str(base_finale) + ';\n' \
'relevant_keys_set = [element for element in relevant_keys_set if element.startswith(\'_\')==False]\n' \
'relevant_keys_set = list(relevant_keys_set);\n' \
'relevant_keys_set_modified = relevant_keys_set.copy(); \n' \
'for i in range(0,len(relevant_keys_set_modified),1): \n' \
' if relevant_keys_set_modified[i].split(\'_\')[0]==\'' + str(prefix_to_delete) + '\': \n' \
' joint_string = \' \'; \n' \
' string_list = relevant_keys_set_modified[i].split(\'_\')[1:] \n' \
' for i in range(0, len(string_list), 1): \n' \
' if i > 0: \n' \
' joint_string += \'_\'; \n' \
' joint_string += string_list[i]; \n' \
' relevant_keys_set_modified[i] = joint_string \n' \
'saved_dictionary' + str(post_finale) + ' = EasyDict() \n' \
'for key_modified,key_original in zip(relevant_keys_set_modified,relevant_keys_set): \n' \
' saved_dictionary' + str(post_finale) + '[key_modified]=final_variables_dictionary[key_original] \n'
return execution_string
###################################################
###################################################
def some_function():
exec(save_tic(1))
a = 1
b = 1
exec(save_toc(1,1)) #suppose to finally return a variable called "saved_dictionary1" which has: saved_dictionary1={'a':1, 'b':1'}
return saved_dictionary1
if __name__ == "__main__":
variables_in_function = some_function()
###################################################